Looking up...
因为；由于
I was late because of the traffic.
我迟到了，因为交通堵塞。
She didn't attend the meeting because she was ill.
她没有参加会议，因为她病了。
Remember to use 'because' to introduce a reason, and 'because of' to introduce a noun or pronoun that is the reason.
The word 'because' originated from the Old French word 'parce que', which means 'because' or 'since'.
Use 'because' to introduce a reason or explanation for something.